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Track creation of board.I2C(), etc.

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This commit is contained in:
Dan Halbert 2022-01-30 23:12:49 -05:00
parent 3fb5023b9e
commit 25707d311a
1 changed files with 17 additions and 6 deletions
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21
shared-module/board/__init__.c
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@ -57,6 +57,7 @@ typedef struct {
static const board_i2c_pin_t i2c_pin[CIRCUITPY_BOARD_I2C] = CIRCUITPY_BOARD_I2C_PIN;
static busio_i2c_obj_t i2c_obj[CIRCUITPY_BOARD_I2C];
static bool i2c_obj_created[CIRCUITPY_BOARD_I2C];
bool common_hal_board_is_i2c(mp_obj_t obj) {
for (uint8_t instance = 0; instance < CIRCUITPY_BOARD_I2C; instance++) {
@ -68,7 +69,7 @@ bool common_hal_board_is_i2c(mp_obj_t obj) {
}
mp_obj_t common_hal_board_get_i2c(const mp_int_t instance) {
return &i2c_obj[instance];
return i2c_obj_created[instance] ? &i2c_obj[instance] : NULL;
}
mp_obj_t common_hal_board_create_i2c(const mp_int_t instance) {
@ -85,6 +86,7 @@ mp_obj_t common_hal_board_create_i2c(const mp_int_t instance) {
common_hal_busio_i2c_construct(self, i2c_pin[instance].scl, i2c_pin[instance].sda, 100000, 255);
i2c_obj_created[instance] = true;
return &i2c_obj[instance];
}
#endif
@ -101,6 +103,7 @@ typedef struct {
static const board_spi_pin_t spi_pin[CIRCUITPY_BOARD_SPI] = CIRCUITPY_BOARD_SPI_PIN;
static busio_spi_obj_t spi_obj[CIRCUITPY_BOARD_SPI];
static bool spi_obj_created[CIRCUITPY_BOARD_SPI];
bool common_hal_board_is_spi(mp_obj_t obj) {
for (uint8_t instance = 0; instance < CIRCUITPY_BOARD_SPI; instance++) {
@ -112,7 +115,7 @@ bool common_hal_board_is_spi(mp_obj_t obj) {
}
mp_obj_t common_hal_board_get_spi(const mp_int_t instance) {
return &spi_obj[instance];
return spi_obj_created[instance] ? &spi_obj[instance] : NULL;
}
mp_obj_t common_hal_board_create_spi(const mp_int_t instance) {
@ -130,6 +133,7 @@ mp_obj_t common_hal_board_create_spi(const mp_int_t instance) {
common_hal_busio_spi_construct(self, spi_pin[instance].clock, spi_pin[instance].mosi, spi_pin[instance].miso);
spi_obj_created[instance] = true;
return &spi_obj[instance];
}
#endif
@ -143,6 +147,7 @@ typedef struct {
static const board_uart_pin_t uart_pin[CIRCUITPY_BOARD_UART] = CIRCUITPY_BOARD_UART_PIN;
static busio_uart_obj_t uart_obj[CIRCUITPY_BOARD_UART];
static bool uart_obj_created[CIRCUITPY_BOARD_UART];
bool common_hal_board_is_uart(mp_obj_t obj) {
for (uint8_t instance = 0; instance < CIRCUITPY_BOARD_UART; instance++) {
@ -154,7 +159,7 @@ bool common_hal_board_is_uart(mp_obj_t obj) {
}
mp_obj_t common_hal_board_get_uart(const mp_int_t instance) {
return &uart_obj[instance];
return uart_obj_created[instance] ? &uart_obj[instance] : NULL;
}
mp_obj_t common_hal_board_create_uart(const mp_int_t instance) {
@ -174,6 +179,7 @@ mp_obj_t common_hal_board_create_uart(const mp_int_t instance) {
common_hal_busio_uart_construct(self, uart_pin[instance].tx, uart_pin[instance].rx,
NULL, NULL, NULL, false, 9600, 8, BUSIO_UART_PARITY_NONE, 1, 1.0f, 64, NULL, false);
uart_obj_created[instance] = true;
return &uart_obj[instance];
}
#endif
@ -190,11 +196,12 @@ void reset_board_buses(void) {
}
}
#endif
if (!common_hal_busio_i2c_deinited(&i2c_obj[instance])) {
if (i2c_obj_created[instance]) {
// make sure I2C lock is not held over a soft reset
common_hal_busio_i2c_unlock(&i2c_obj[instance]);
if (!display_using_i2c) {
common_hal_busio_i2c_deinit(&i2c_obj[instance]);
i2c_obj_created[instance] = false;
}
}
}
@ -217,18 +224,22 @@ void reset_board_buses(void) {
#endif
}
#endif
if (!common_hal_busio_spi_deinited(&spi_obj[instance])) {
if (spi_obj_created[instance]) {
// make sure SPI lock is not held over a soft reset
common_hal_busio_spi_unlock(&spi_obj[instance]);
if (!display_using_spi) {
common_hal_busio_spi_deinit(&spi_obj[instance]);
spi_obj_created[instance] = false;
}
}
}
#endif
#if CIRCUITPY_BOARD_UART
for (uint8_t instance = 0; instance < CIRCUITPY_BOARD_UART; instance++) {
if (uart_obj_created[instance]) {
common_hal_busio_uart_deinit(&uart_obj[instance]);
uart_obj_created[instance] = false;
}
}
#endif
}